Lock mechanism of breech-loading guns.



A; T. UAW-SON & G. T. BUCKHAM.

LOCK MECHANISM OF BREECH LOADING GUNS.

APPLICATION FILED APR. 1. 1914.

1,147,217. Patented July 20,1915.

COLUMBIA PLANOORAPH 60., wAsumu'rnN. D. c.

D STATES PATENT OFFICE.

ARTHUR TREVOR DAWSON AND GEORGE THOMAS BUCKHAM, OF WESTMINSTER,

LONDON, ENGLAND, ASSIGNOIRS T0 VICKERS LIMITED, OF WESTMINSTER, ENG- LAND.

IiOCK MECHANISM OF BREECH-LOADING GUNS.

Specification of T 0 all whom it may concern.

Be it known that we, ARTHUR TREVOR DAWSON, knight, and GEORGE THOMAS Buox- HAM, both subjects of the King of Great Britain. residing at Vickers House, Broadway, Vestminster, in the county of London, England, have invented certain new and useful Improvements in or Relating to the Lock Mechanism of Breech-Loading Guns, of which the following is a specification.

This invention relates to lock mechanism of the kind having a re-priming device that comprises a bolt adapted to insert a new primer into its chamber in the vent axial, 'and of the kind having a lock frame capable of moving laterally in a box slide on the breech screw carrier.

According to this invention we form the lock frame with a conical recess to guide the primers into their chamber in the vent axial during the forward movement of the bolt, whereby a more eificient introduction of the primers into position is obtained as compared with the arrangements heretofore employed.

In order that the said invention may be clearly understood and readily carried into eifect, we will describe the same more fully with reference to the accompanying drawing, which is a longitudinal vertical section through the bolt showing a constructional form of the invention.

A is the vent axial, B the box slide, O the lock frame, E the bolt, E the bolt sleeve, F the extractor and G the firing pin or striker.

O represents the aforesaid conical recess in the lock frame O, the smaller end of the recess being just large enough to enable the head of the primer to pass through it. The bolt head is made of corresponding conical formation and carries locking lugs e.

In the example shown, the bolt sleeve E is provided with a downwardly extending pin 6 which engages with a cam slot E formed in an arm E that is pivoted to the lock frame. The purpose and construction of this arm (which is termed the cooking arm) is fully set forth in our United States Letters Patent No. 1095558.

l/Vhat we claim and desire to secure by Letters Patent of the United States is 1. In lock mechanism for ordnance, the

Jopies of this "patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

L t r P n Patented July 20, 1915.

785,018. Divided and this application filed April 7, No. 830,126.

combination with the box slide and the lock frame moving therein transversely to the axis of the gun, of a primer bolt carried by said frame, a firing pin mounted in said bolt, means for actuating said bolt to cook the firing pin and to insert a new primer into the primer chamber, said lock frame having a conical recess to serve as a guide for the primers during their insertion into the primer chamber.

2. In lock mechanism for ordnance, the combination with the box slide and the lock frame moving therein transversely to the axis of the gun, of a primer bolt carried by said frame, a firing pin mounted in said bolt, means for actuating said bolt to cook the firing pin and to insert a new primer into the primer chamber, said lock frame having a conical recess to serve as a guide for the primers during their insertion into the primer chamber, said conical recess receiving a conically shaped head of the bolt.

3. In lock mechanism for ordnance, the combination with the laterally moving lock frame, of a primer bolt carried by said frame, a firing pin mounted in said bolt, a primer extractor having a recess with inclined surfaces, means for actuating said bolt to cook the firing pin and to insert a new primer into the primer chamber, said lock frame having a conical recess to serve as a guide for the primers during their insertion into the primer chamber.

4. In lock mechanism for ordnance, the combination with the laterally moving lock frame, of a primer bolt carried by said frame, a firing pin mounted in said bolt, a primer extractor having a recess with inclined surfaces, means for actuating said bolt to cock the firing pin and to insert a new primer into the primer chamber, said lock frame having a conical recess to serve as a guide for the primers during their in sertion into the primer chamber, said conical recess receiving a conically shaped head of the bolt.

In testimony whereof we afiix our signatures in presence of two witnesses.

ARTHUR TREVOR DAl/VSON. GEORGE THOMAS BUOKI-IAM. Witnesses:

HENRY KING, Jim. R. OAswnLL. 

